| 摘要 |
The invention relates to a method (50) for searching for the presence of a useful signal having a pre-defined spectral width ∆B in a multiplexing band having a spectral width larger than ∆B, comprising steps of: (51) calculating a frequential signal representative of a spectral power density in the multiplexing band; (54) calculating a non-useful signal by filtering the frequential signal by means of a filter suitable for eliminating all or some of the signals having a spectral width equal to or less than ∆B; (56) calculating a power ratio signal representative of the ratio between the frequential signal and the non-useful signal; and (57) comparing the power ratio signal with a pre-defined threshold value. The invention also relates to a computer program product, a receiving unit, and a station (30) of a digital telecommunications system (10) comprising such a receiving unit. |
